Abstract
The CERN Axion Solar Telescope (CAST) experiment searches for axions from the Sun converted into few keV photons via the inverse Primakoff effect in the high magnetic field of a superconducting Large Hadron Collider (LHC) decommissioned test magnet. After results obtained with vacuum in the magnet pipes (phase I of the experiment) as well as with 4He the collaboration is now immersed in the data taking with 3He. The status of the experiment will be presented, including a preliminary indication of the axion parameter space explored up to now. CAST is currently sensitive to realistic QCD axion models at the sub-eV scale, and with axion-photon couplings in the range down to the ~ 2 × 10−10 GeV−1, compatible with solar life limits.
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